Diameter correction can be accomplished in several ways.  One of which is with a micrometer.  To correct by this method, lightly turn one spacer, mike it and set infeed dial on zero.  Determine the amount to be removed, keeping in mind the diameter will be reduced twice the dial setting.  The dial should be set for half the amount to be removed.  Recheck after cutting and adjust as necessary.  All rolls can be cut on this setting.

Should a heavy cut be necessary, take two cuts, one heavy - one light, with the last one set on zero.